Apparatus and method for forming inner tubes for pneumatic tiies



. W. C TYLER. APPARATUS AND METHOD FOR EORMTNG INNER TUBES EoR RNEUMATTC TIRES.

APPLICATION FILED AUG-8,1918.- I

'PatelTted Mar. 2, 1.920.

application filed and method *for use "be construction et inner tubes for pneumatic tires,

.e he f iueipal objeetuoit esent ini/'enf' tion is' to provideen ep;

inner tubes of suoli a r nre ti et i' epplied direotl,Y te calender. sur i built oz-n la-uuneti Continuous manner and s etly Woundnpon s continuously :ted series cT isndreis.

'i above epd additional o-bioets of e :ler nature, may be eoeomplisbel by suoli es ere illustrated in t? ing dr Wings, described in tne following speoiiieation, nd then. more particularly pointed out in the claims which are eppended hereto and torni e 'gert of this epnlieation, With reference to Ythe drawings uf'herein there hes been illustrated preferred embodiment of the invention es it is reduced to erect-ice, and throughout the several views or 'which similar reference numbers designate eorresponding parts:

Figure l represents diegrammatioelly a irontlview of a .Calender with my improved. apparatus mounted thereon;

Fig. Q represents an end View of the same; and

3 represents a sectional View of one end oi? a mandrel illustrating the starting' of the laminations of rubber upon the mandrel.

in the drawings the numeral 'l0 designates the calender as a. Whole; ll the li ives mounted thereon to produce aseries of narrow strips of stock of equal Width; and l2 the strips of stock.

The, calender l() may be of the usuel or any approved construction.

The `knives ll may be ot any suitable type, those shown being' provided with `rouneed edged portions 18 the ends of the bers 14C, which letter ediustably mounted on the rod 15 which is in turn mounted in brscliets l@ at sched to the-rear 'fece ot the side supports 17 and 1' ot the calender l0.

Speereation of Letters Patent.

ne aeoonipenyby the cross arms 36. .the shafts Si mesh with bevel wh 38 pw Serial No. 245,836.

innndrels if or any s iteole ooi su. i et detach ely oinin g tudiual alinement.

ln carri" out my present invention s l0 suitable ieobenlsm i ted in l* and or rotating ine .f tenemislj,Y inolliro th s so hat the strips i e manner to forni e.

of mute-rial on L" Wound ni relity ot ,le s

The mechanism eonstmietei lows' bracket or weine 2li is ettari side of which is provided' with gi in mesh with the spur 'pinion mounted in the bea-ring bracket ably connected to the driving The toothed ring carries for stud shafts 30 toA which are atteste eight rollers 3l which normally Contact the mandi-els i9. @n the stud shafts 30 mounted the spur Wheels 3Q which mesh with spur wheels 3301i shafts 3larranged on bearings 35 attached to the bearings 29 Bevel pinions 37 on vided on a ring 39 which is stationerily mounted on the bracket 2l.

@n the side support 17 of the calender l0 is mounted a bearing member fl() adapted to support and guide the mandrels l.

From the foregoing detailed description, the construction and operation of the anperatus will be apparent to those skilled in the u ln starting the Winding on the first in andrei.

19 of the strips of materiel 12, the strip indioated at (a.) is Wound on the mandrel to form the inner layer or lamination; the stri indicated at (b5 is Wound on the .to lap the convolutions of the strip. (o) and then the strips (c), (d), (e) and (f) are successivelyY wound on each other to have succeeding strips overlap 'the convolutions oi: preceding strips and to form the layers or laminations of material as seen in Fig. 3. It will be understood that after starting the winding ot' 'the layers ot' material on the first mandrel, the winding of the layers of material to t'orm a tubular covering on a series of detachably connected' mandrels can be continuously performed. After the strips of material have been wound on the mandrels, the material is cut transversely around 'the mandrels at the junction of adjacent mandrels, andthe separate mandrels with the material thereon prepared for vuleanization in .the usual or any approved manner.

What I claim is:

l. An apparatus tor forming an inner tube on a mandrel, comprising the combination with a calender, of a frame on said calender, a pair of Ibight rollers carried upon said :trame and supporting thev mandrel,

means for rotating said rollers about a com,-

mon axis to rotate the mandrel', and meanstbetween the rollers and the frame operable simultaneously with said rst means for Vrotating the rollers about their own axes,

whereby the mandrel is moved longitudinally. i

2. An apparatus for` forming an inner tube on a mandrel comprising the combination with a calender, of a frame on said callendexyapair of bight'rollers carried upon said frame and supporting the mandrel, means carried'upon the frame for rotating said bight rollers about a common axis to rotate the mandrel, means between the rollers and the frame' operable simultaneously Awith said rst means for rotating said rollers about their own axes, whereby the mandrel is moved longitudinally, and means upon the calender for guiding the mandrel in its longitudinal movement.

3. An apparatus for forming an inner tube on a mandrel, comprising the combination with a calender, of a frame on said calender,

a rino rotatablv mounted on said frame rollers carried by said ring and adapted to contact with the mandrel, a stationary ring, and 4operative. connections between said stationary ring and said rollers.

. 4.. An apparatus for forming an inner tube on a mandrel, comprising the combination of a calender-, abracket mounted pn said calender, a ring mounted rotatably on said bracket,y rollers carried by said ring and adapted to contact with the mandrel, a

toothed ring stationarily mounted on said braclet,and means operatlvely connected with the stationary toothed ring for rotating l said rollers tolmove the mandrel longitudinally ot' its axis.

5. The method of forming an inner tube for pneumatic tires, which comprises the following steps (l) cutting a sheet of the tube material into a series of strips arranged cutting the sheet ot' material to form a series l of strips of the material on one roll ofthe calender, rotating a mandrel and simultaneously moving the mandrel along a path parallel to the axis of the roll, and passing the strips of material from the roll onto the mandrel in such manner that the succeeding strips are wound over preceding strips and form' a series of layers of the material on the mandrel.

7. A method of forming an inner tube for pneumaticv tires which comprisesz'calenden ing a sheet of inner tube material, cutting said sheet into a number otl parallel strips as the sheet emerges from thiA calender, feeding a mandrel across the paths along which the strips are withdrawn Jfrom the calender, the mandrel being simultaneously rotated with the transverse movement relatively to the strips, and attaching the strips to the mandrel whereby the strips are wound helpieally around the :mandrel in such manner that the successive strips, commencing 'with the strip located at the advance portion of the mandrel, are superimposed one upon the other.

In Witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIAM C. lYLIlR.

Witnesses:

VIRGINLLC. P ruL, LIBBIE A. Po'ronsKr. 

